(1) This species substitutes for a proton on an electron rich carbon in the benzene ring.

(2) It was the antiparticle to the electron , later called the positron.

(3) The electron and muon neutrinos are easier to produce and detect than the tau neutrino.

(4) It was soon discovered that the proton, the neutron, and the electron are not alone.

(5) Most beta decays involve the emission of electrons from the nucleus as a neutron decays into an electron and a proton.

(6) The antiparticle of the electron is the positron; there are also antiquarks and antineutrinos.

(7) The ionization energy is the energy needed to remove an electron from a gaseous atom.

(8) The outer shell of an oxygen atom holds six outer electrons , though it has room for eight.

(9) At that stage, the electrons and ions combined into neutral atoms that no longer scattered the radiation.

(10) Electric current is the movement of electrons from one atom to another in a conductor.

(11) If this attraction is strong enough, it will pull the electrons free from the atoms.

(12) Like the Solar Wind, the magnetosphere is full of plasma, consisting of ions and electrons .

(13) If the star were squeezed even more by gravity, the electrons could be forced to combine with protons to make more neutrons.

(14) It exists when the electrons of the atom are occupying the orbitals of lowest energy.

(15) For example, two electrons in an atom may differ in orbital angular momentum or in spin direction.

(16) Chemical reactions inside the cell strip electrons from the hydrogen atoms to produce a voltage that can power a circuit.

(17) At the time, it was believed that electrons colliding with atoms always lost energy.

(18) It was like looking at the evenly spaced energy levels of electrons in an atom.

(19) This means that an atom with eight electrons in its outermost energy level is very stable.

(20) Nucleons like to pair up and form a shell structure, just as electrons do in atoms.